Feature 1High Paper Capacity: These double loop binding rings can hold up to 120 sheets of paper (A4, 70g), accommodating your sizable binding needs. 2Metallic Inner Wire: The binding wires are made from high strength metallic iron, solid and durable, allowing you to easily bind papers together for long term storage. 3Nylon Coating: The wires feature an external nylon coating, offering good surface gloss, corrosion resistance, and wear resistance for prolonged usage. 4Perfect Size: Each binding spine has a diameter of 9/16 of an inch and a thickness of 0.8mm. Each spine has 3:1 pitch and has 34 double loops, allowing 360 degree rotation. 5Application: Used to bind important documents, files, or reports for your upcoming presentations or projects. Compatible with most wire binding systems (3:1 pitch and 34 hole pattern).Item Type:SpiralDoubleLoopWireBindingRingsMaterial: Iron, nylon .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Binding Diameter: Approx. 14.3mm / 0.56inBinding Capacity: 120 sheets (A4, 70g)Teeth Quantity: 34 teethRatio: 3:1Package List100 x CombBindingSpine